This saying refers to the fact that each person's journey is unique and different. Their experiences evoke different responses. And the event that leads to wanting to a different life will be unique to that person. And when that moment happens recovery and transformation begins.
For some it takes loosing family and friends, another falling in love, having a child, or just being tired of being tired. It can be an unexpected run in with death, or an arrest. All these things stimulate yearning for a new life. In these moments a person is struck with grace and an opening occurs.
The priest made a point to say that he does not change lives, God does that. He does not use persuasion as a tool, but points to the door and says 'I believe that if you go through that door you will live a happier life.' The priest looks for people who are ready to change.
This has familiar tones of the Prodigal Son (Luke 15:11-32). People come to themselves through varied experiences. Zacchaes needed Jesus to dine with him, the woman at the well needed a penetrating and true conversation, the paralyzed man need to be confronted about his desires of healing, a rich man needed a nightmare about Lazarus at his doorstep, the bleeding woman needed a touch of grace from Jesus.
How do we come to ourselves? How does God's grace break through? It takes what it takes.